Railway-track construction



Jan. '10, 1928. 1,655,770

N. R. LOVE RAILWAY TRACK CONSTRUCTION Fi led Dec. 29. 1925 2Sheets-Sheet 1 Jan. 10, 1928.

N. R. LOVE RAILWAY TRACK'CONSTRUCTION 2 Sheets-Sheet .2

Filed Dec. 29. 1925 e- 0'1. a ra Lore.

. r A INVENTOR. Q Mason Patented Jan. 10, 1928.

UNITED STATES NELSON R. LOVE. OF DENVER, COLORADO.

RAILWAY-TRACK CONSTRUCTION.

Application filed December 29, 1925.

This invention relates to railway track construction and moreparticularly to the construct-ion of tracks of street railway systems inwhich the rails are supported on metal ties and rigid foundations.

It is an object of the invention to provide in a railway track of theabove described character, means for the resilient support of the railsso that they may yield in a vertical direction for the purpose ofreducing the noise, shocks and vibration incident to the passage of carsalong the track.

A further object of the invention is to permit the rails of a streetrailway track to ield in a vertical direction by the provision oi aresilient support, without materia change in their gauge or verticalposition, andstill another object is to include in a street railway inwhich the rails are yieldingly supported, cushioning means between therails and a rigid paving structure in which the track is laid.

lVith the above and other objects in view, my invention consists in theconstructions arrangement and combinations of parts illustrated in theaccompanying drawin'" the several views of which like parts aresimilarly designated and in which:

Figure l representsa plan view of a ooze tion of a railway trackconstructed in accord ance wit the present invention, showing thematerial in which the track is laid, in horizontal section,

Figure 2, a longitudinal section through 1'. one of the rails ol thetrack taken on the line 2--2 liigurc 1,

Figure 3, a cross section of the track through one of the ties uponwhich the rails are supported, taken on the line 3*?) ure 1,

Figure l, a cross-section ot the track between the ties, along the lineFigure 1 Figure 5, a sectional view similar to that of Figure l,illustrating the arrangement of the cushioning means included in theinvention, in tracks laid in partially rigid pavements, 7

Figure 6, a plan view of a portion of a railway track, showing theapplication of the invention to railways in which the ties supportingthe rails are coupled in pure,

Figure 7, a transverse sectiontak'en in two different planes indicatedby the line 17 in Figure 6, and

or M) Serial No. 78,177.

F igure 8, a vertical section longitudinally of the track illustrated inFigure 6, taken along the line 8-8.

Referring first to Figures 1 to 3 ot the drawings, the rails 5 of therailway track are supported on cross ties 6 preferably composed of metalbars of chaimehsection. The middle portions 01' the ties between therails, are rigidly supported on a foundation bed i usually made ofconcrete, while the outer portions of the ties beneath and at the outside of the rails are laid upon cushions 8 of an elastic and preferablyplastic material, as for example, asphalt or an asphaltic compound.

Although the cushions beneath the ties are the principal factor inattaining the ob ject of the invention, it is desirable that thecushioning material be extended to embrace the sides of the ties beneaththe rail as best shown at 9 in Figures 2 and It will be apparent that bythe construction so far described, the outer portions or the ties, uponwhich the rails are fastened, are adapted to hex in a vertical directionrelative to the middle port-ions of the same which are rigidly anchoredon the foundation.

lVhen by the passage of loads along the track, the rails are subjectedto downward stress, the ties perform the function of yielding supports,in a cantilever manner, to absorb and deaden the vibration and shocksdue to the movement of the load and reduce the noise of travel. Therails are at the same time maintained at the proper gauge, and after theload has passed, they are rcturned to their original elevation by theelastic properties of the ties and the cushions on which theirei'id-portions are supported. 7

The cushioning material at the sides of the ties, moreover, prevents theshocks and vibrations from being communicated to the foundation of thetrack or the pavement in which the track is laid, and at the same timeprovides for the free up and downward motion of the end-portions of theties under the stress of passing loads.

In order to further absorb and deaden the detrimental stress to whichthe track is subjected in the operation of the railway, the rails aresupported between the ties upon cushions 10 or" elastic material laid onthe foundation structure, the said cushions being for convenience inconstruction formed in one mass with the resilient material in which theend-portions of the ties are enveloped, as clearly indicated in Figure 2of the drawings.

When, as in the form of the invention illustrated in Figures 3 and l,the paving 12 of the street or roadway on which the track is laid, iscomposed of a rigid material such as concrete, stone or brick, cushions13 of resilient material are interposed between the sides of the railsand the paving so that none of the jars and vibrations to which therails are subjected are directly communicated to the relatively fixedand rigid substances.

In Figure 5 has been, shown a road construction in which only the spacebetween the rails is paved with concrete or other rigid material, andthe road surfaces at the outside of the track are either left in theirnatural condition or paved with a yieldable material 14 such as asphalt.

It is obvious that in this instance, the cushions on the outer sides ofthe rails may be omitted, and it will be equally evident without furtherillustration, that if the entire roadway between, as well as at thesides of the track, is, either unpaved or paved with a yieldingsubstance, both cushions at opposite sides of the rails may beeliminated.

In the construction illustrated in Figures 6, 7 and 8, the ties 6 arecoupled in pairs by means of metal plates 15 and the cushioningsupports, which in the first described form of the invention extendedunder the ends of each tie separate from the others, are now extended toencompass also the coupling plates of the ties as shown at 8.

Other modifications, depending mostly on different characteristics ofthe tracks to which the invention is applied and the na ture of theroadways on which the tracks are laid, may be resorted to withoutdeparting from the spirit of the invention.

What I claim and desire to secure by Letters Patent is:

1. In railway track construction, the c01nbination with the rails; of arailway track, of a foundation for the track, cross-ties having theirmiddle portions between the rails rigidly supported on'the foundation,and cushions of elastic material enveloping the end-portions of theties, on which the rails are supported.

2. In railway track construction, the combination with the rails of arailway track, of a foundation for the track, cross-ties having theirmiddle portions between the rails rigidly supported on the foundation,resilient cushions beneath the end-portions of the ties, on which therails are supported, and resilient cushions between the sides ofthe tiesand the foundation.

bination with the rails of a railway track, of a foundation for thetrack, cross-ties having their middle portions between the rails rigidlysupported on the foundation, cushions of elastic material enveloping theendportions of the ties, on which the rails are supported, and cushionsof elastic material beneath the rails, between the ties, formed in amass with those in which the endportions of the ties are enveloped.

4. In railway track construction, the combination with the rails of arailway track, of a rigid foundation for the track, a rigid pavingbetween the rails, cross-ties supported upon the foundation, between therails, resilient cushions beneath the end-portions of the ties, on whichthe rails are supported, resilient cushions beneath the rails betweenthe ties, and resilient cushions between the sides of the rails and thepaving.

5. In railway track construction, the combination with the rails ofarailway track, of a rigid foundation for the track, a rigid pavingbetween and at opposite sides of the rails, cross-ties supported uponthe foundation, between the rails, resilient cushions beneath theend-portions of the ties, on which the rails are supported, resilientcushions beneath the rails between the ties, and resilient cushionsbetween the sides of the rails and iii the paving.

6. In railway track construction, the combination with the rails of arailway track, of a rigid foundation for the track, crossties connectedat their ends, and supported at their middle portions between the rails,on the foundation, and resilient cushions beneath the end portions ofthe ties and their connections.

7 In railway track construction, the combination with'the rails of a.railway track, of a rigid foundation for the track, crossties supportedat their middle portions between the rails, on the foundation, platesconnecting the ends of the cross-ties in pairs, and resilient cushionsbeneath the end portions of the rails and the plates.

8. In railway track construction, the combination with the rails of arailway track, of a rigid foundation for the track, crosstiesconnectedat their ends in pairs, and supported at their middle portions betweenthe rails, on the foundation, and resilient cushions beneath theend-portions of the ties and their connections.

9. In railway track construction, the combination with the rails of arailway track, of a rigid foundation for the track, crossties connectedat their ends in pairs, and supported at their middle portions betweenthe rails, on the foundation, resilient cushions beneath theend-portions of the ties and their connections, and resilient cushionsbeneath the rails between the pairs of connected ties. 3. In' railwaytrack construction, the com- ]O. In railway track construction, the

combination With the rails of arailway track, of a rigid foundation forthe track, cross-ties connected at their ends, and supported at theirmiddle portions between the rails, on the foundation, cushions ofelastic material beneath the end-portions of the ties and theirconnections, and cushions of elastic material beneath the rails betweenthe ties.

formed in a mass with the first mentioned cushions.

NELSON R. LOVE.

